In medium bowl, stir together dissolved gelatin, tea, and remaining 1 1/2 cups juice. Refrigerate juice mixture about 1 3/4 hours or until it has the consistency of unbeaten egg whites, stirring occasionally. (To quick-chill gelatin, set bowl in larger bowl of ice water and stir frequently with rubber spatula just until mixture begins to thicken.)

Stir raspberries and cantaloupe into thickened gelatin; pour into 5-cup mold. Cover and refrigerate at least 4 hours or until firm.

To unmold gelatin, place mold up to rim in bowl of warm, not hot, water for a few seconds. Be careful not to melt gelatin. Remove mold from water. Insert small metal spatula around edge of mold to release gelatin. Dry outside of mold. Invert platter on top of mold, then quickly invert mold and platter together. Lift off mold. Garnish with mint, raspberries, and cantaloupe.